PWM

NR891D Datasheet PDF – PWM Controller IC, DIP 8

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Part Number: NR891D, NR891

Function:  PWM Controller IC, Step-down Switching Mode Regulator IC

Package: DIP 8 Pin Type

Manufacturer: Sanken, SK

Image:
NR891D image

Description

This is Step-down Switching Mode Regulator IC.

1. Full-Mold, Separate Excitation Step-down Switching NR887D/NR891D Mode Regulator ICs

2. Current Mode Control, Synchronous Rectifier Step-down Switching Mode

Features

1. Input voltage range (VIN): VO + 3 to 18 V
2. Synchronous rectifier mode
3. High efficiency: 90%
4. Introduction of current mode control method
5. A ceramic capacitor can be used for output
6. Built-in phase correction component
7. Output current: 2 A
8. Reference voltage and accuracy of 0.8 V ± 2%
9. Oscillation frequency: 500 kHz
10. Output ON/OFF available
11. Undervoltage lockout
12. Soft start function

Pinout

NR891D pinout

Applications

1. Power supply for LCDTV and PDP
2. Power supply for DVD, BD, and STB
3. On-board local power supply
4. Power supply for switches

NR891D Datasheet


 

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FAN7601 Datasheet – Green Current Mode PWM Controller

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Part Number: FAN7601

Function: Green Current Mode PWM Controller

Package: DIP, SOP 8 Pin Type

Manufacturer: Fairchild Semiconductor

Pinouts:

FAN7601 datasheet

 

Description

The FAN7601 is a green programmable frequency current mode PWM controller. It is specially designed for the off-line adapter application and the auxiliary power supplies which require high efficiency at a light load and no load.

The internal high voltage start-up switch and the burst mode reduce the power loss. The FAN7601 includes some protections such as latch protection and over voltage protection. The latch protection can be used for over voltage protection and/or thermal protection and so on. And the soft start prevents the output voltage over shoot at start up.

Image and pinouts :

FAN7601 Block Diagram

Features

1. Green Current Mode PWM Control

2. Low Operating Current: Max 4mA

3. Burst Mode Operation

4. Internal High Voltage Start-up Switch

5. Under Voltage Lockout (UVLO): 12V/8V

6. Latch Protection & Soft Start Function

7. Over Voltage Protection: 19V

8. Operating Frequency up to 300kHz

9. Max Duty Cycle: 95%

Typical Applications:

1. Off-Line Adapter Applications

2. Auxiliary Power Supplies

FAN7601 Datasheet

FAN7601 pdf

Other data sheets are available within the file:  FAN7601B, FAN7601BG, FAN7601BM ,FAN7601BMX

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